No I'm trying to connect digital SPDIF from Xonar to my 5.1 amplifier that has digital Coax In, and standard coaxial audio cable doesn't match Xonar's 3.5mm jack, so I was looking for adapter of some sort.

Basically I want to plug this into Xonar SPDIF out:

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Ah got ya, I think it won't work like jdrom17 said it's a special jack. I believe analog when used like a regular jack and digital when the Toslink adapteris inserted? You'll probably have to use the Toslink adapter and the S/PDIF to Coax converter you have.

At the end of 2007, NVIDIA released a new Geforce 8400 GS based on the G98 (D8M) chip.[8] It is quite different from the G86 used for the "first" 8400 GS, as the G98 features VC-1 video decoding completely in hardware, lower power consumption, lowered 3D-performance and a smaller fabrication process. The G98 also features dual-link DVI support and PCI Express 2.0. G86 and G98 cards are both sold as "8400 GS", the difference can only be told from technical specifications.